The Etage-Graph package

Data-flow based graph algorithms using the Control.Etage framework, showcasing its use for data-flow
computations. It is meant to be used with the Data.Graph.Inductive package which provides graph structures
these algorithms take as an input.

Currently only the shortest paths computation is implemented (from all to all nodes).

Also a benchmarking test program is provided, comparing the performance with algorithms found in the
Data.Graph.Inductive package.